CVE-2026-54914highCWE-122

CVE-2026-54914: fallo de gravedad alta en bytecodealliance wasm-micro-runtime

WebAssembly Micro Runtime: Heap Buffer Overflow in WAMR WASI poll_oneoff Output Buffer

Publicada el

Seguir esta CVE+ Monitorear wasm-micro-runtime

Aviso por correo cuando entre en el KEV, tenga PoC pública o suba de nota.

21Vexday Risk Score

Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.

ssvc Trackcvss 8.3epss 0.4%
WebAssembly Micro Runtime (WAMR) is a lightweight standalone WebAssembly (Wasm) runtime. Prior to 2.4.5, wasi_poll_oneoff in core/iwasm/libraries/libc-wasi/libc_wasi_wrapper.c validates the output pointer for only one wasi_event_t, while wasmtime_ssp_poll_oneoff in core/iwasm/libraries/libc-wasi/sandboxed-system-primitives/src/posix.c can write as many events as the guest-controlled nsubscriptions value. A crafted guest module can provide multiple subscriptions that produce events while positioning an output region large enough for only one event, causing a later out[nevents] write to cross the validated Wasm linear-memory boundary into adjacent host heap memory. The overwrite contains partly attacker-controlled event data and can reliably crash the host process, with further confidentiality or integrity consequences depending on heap layout. This issue is fixed in version 2.4.5.
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N
Productos afectados
bytecodealliance · wasm-micro-runtime
CVEs relacionadas — bytecodealliance wasm-micro-runtime

En el mismo producto, de las más peligrosas a las menos.

CVE-2025-54126MEDIUMWebAssembly Micro Runtime's `--addr-pool` option allows all IPv4 addresses when subnet mask is not specifiedEPSS 0.7%CVE-2026-54912HIGHWAMR fast interpreter loader heap buffer overflow via constant deduplication mismatchEPSS 0.5%CVE-2025-58749LOWWAMR runtime hangs or crashes with large memory.fill addresses in LLVM-JIT modeEPSS 0.4%CVE-2025-64713MEDIUMWebAssembly Micro Runtime frame_offset_bottom array bounds overflow in fast Interpreter mode when handling GET_GLOBAL(I32) followed by if opcodeEPSS 0.4%CVE-2026-54913MEDIUMWebAssembly Micro Runtime: Missing `ref.null` heap-type validation in `load_init_expr` leaks host stack memory to the WebAssembly guestEPSS 0.3%CVE-2025-43853HIGHiwasm vulnerable to filesystem sandbox escape with symlink when using uvwasi featureEPSS 0.3%